Custom WooCommerce Dev

Were working on a membership site which is using Paid Memberships Pro to manage users and the WooCommerce extension to sell the membership levels. We need to add some custom fields to the checkout form which is also working as the signup form. Eg. We need to have a checkbox and if checked it will show next to that user in the admin members list area. I'm available now on Skype now to go through all of the fields that need to be added, ideally we want these bits to be done tonight/tomorrow morning.